United State Aluminum 450 Series 1-3/4" x 4-1/2" Open Back Storefront Door Frames

Shop our complete selection of US Aluminum 450 Series 1-3/4" x 4-1/2" open back storefront door frames, engineered for superior performance in commercial aluminum entrance systems. These heavy-duty frames are factory prepped for offset pivot hinges and are specifically designed to work with multiple US Aluminum storefront door series, making them one of the most versatile framing solutions in the industry.

Compatible With 250, 400, and 550 Series Storefront Doors

US Aluminum 450 Series frames are fully compatible with all major US Aluminum offset pivot door systems, including:

• US Aluminum 250 Series Narrow Stile Doors
• US Aluminum 400 Series Medium Stile Doors
• US Aluminum 550 Series Wide Stile Doors

This broad compatibility ensures seamless integration with the most common commercial door configurations used in retail storefronts, office buildings, restaurants, and multi-tenant commercial environments.

Left Hand and Right Hand Frame Options

All 450 Series frames are available in both Left Hand and Right Hand configurations to match your existing door swing direction and hardware preparation. Each frame is clearly labeled to simplify selection and reduce installation errors.

Clear Anodized and Black Bronze Anodized Finishes

Choose from the industry’s most popular architectural aluminum finishes:

• Clear Anodized – Clean, bright, and compatible with modern storefront systems.
• Black Bronze Anodized – Deep architectural tone ideal for upscale commercial properties.

Standardized Commercial Frame Dimensions

All US Aluminum 450 Series frames follow standardized commercial storefront dimensions:

• Outside Frame Dimensions: 39-1/2" Wide x 85-3/4" Tall
• Inside Frame Dimensions: 36" Wide x 84" Tall
• Recommended Rough Opening: 40" Wide x 86" Tall

Includes 4" Aluminum Door Threshold

Each frame includes a heavy-duty 4" wide x 1/2" tall aluminum threshold, providing a durable, ADA-friendly transition at the entrance.

Knock Down (KD) Design for Easy Shipping and Installation

US Aluminum 450 Series frames ship in a knock down configuration for reduced freight cost and easier jobsite handling. Minor assembly is required, making these frames ideal for glaziers, contractors, and installers working under tight schedules.

Frame Only – Doors Sold Separately

This category includes frame-only products. US Aluminum storefront doors from the 250, 400, and 550 Series can be purchased separately. If you need a complete door-and-frame package, our team can provide a customized quote.

Ideal Applications

• Retail storefront entrances
• Shopping centers and strip malls
• Corporate office buildings
• Restaurants and hospitality
• Healthcare and medical offices
• Schools and universities

US Aluminum 450 Series 1-3/4" x 4-1/2" open back storefront door frames deliver unmatched compatibility, durability, and architectural performance—making them the preferred choice for commercial entrance framing.

United States Aluminum Commercial Glass Door Parts